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Fabrication of Molecularly Imprinted Electrospun Nanofibers with Mono-amidoxime Functional Ligand for Efficient Decontamination of Toxic Organophosphates

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Chinese Journal of Polymer Science 2024年第4期42卷 446-456页

作者： lan Wang Peng Jiang Ya-Lin Niu Jun-Peng Cao tian-Ying Guo Key Laboratory of Functional Polymer Materials Ministry of EducationInstitute of Polymer ChemistryCollege of Chemistry and Frontier Science Center for the Creation of New Organic SubstancesNankai UniversityTianjin300071China

There is an urgent imperative to discover practical and efficacious artificial catalysts for the expeditious decontamination of toxic organophosphates. Herein, we propose a novel molecularly imprinted approach utilizing electrospun fiber scaffolds. Specifically, an amidoxime-based functional polymer (PMAOX) has been synthesized, which contains amidoxime groups that can act as nucleophiles and ligands for the formation of catalytic active sites. This polymer was blended with polyacrylonitrile (PAN), a well-processable material, to prepare a nanofiber mat using electrospinning techniques. Then, the amidoxime side groups on fiber surface were further cross-linked after the molecular coordination of templates to complete the molecularly imprinting process. This approach can not only enhance the content of functional molecularly imprinted polymers without affecting structural stability, but also combines surface MI technology to fully expose and leverage the advantages of active sites. The as prepared molecularly imprinted electrospun nanofibers MIF-Zn-PMAOX/PAN-6/4 catalyzes the degradation of paraoxon with a half-life of 32 min, and MIF-Ag-PMAOX/PAN catalyzes the degradation of parathion with a half-life of 18 min. The maximum catalytic rate evidence rate enhancements nearly 3700-fold of the self-hydrolysis. Thus, the mono-amidoxime based molecularly imprinted fibers demonstrate the versatility and superiority as self-detoxifying for organophosphates.

关键词： Organophosphateshydrolysis Electrospinning Molecular imprinting

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Design and characterization of a novel Cu_(2.3)Al_(1.3)Ni_(1.7)SnCr_(0.3) multi-principal element alloy coating on magnesium alloy by laser cladding

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Journal of Materials Science & Technology 2023年第21期152卷 220-236页

作者： Lipeng Jiang Xiufang Cui Guo jin Zhimin tian Xin Wen Haoliang tian Erbao Liu Institute of Surface/Interface Science and Technology Key Laboratory of Superlight Material and Surface Technology of Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material Beijing Beijing Institute of Aeronautical MaterialsBeijing 100095China Institute of Defense Engineering AMSPLABeijing 100850China

The evaporation and dilution of substrate seriously limit the performance of laser cladding coatings on magnesium *** order to overcome the above shortcomings,a multi-step ultrasonic assisted laser remelting technology was proposed to improve the performance of the *** this work,a novel Cu_(2.3)Al_(1.3)Ni_(1.7)SnCr_(0.3) multi-principal element alloy coating(MPEAC)was prepared on the surface of mag-nesium *** techniques such as transmission electron microscopy(TEM),electron back scatter diffraction(EBSD)and scanning electron microscopy(SEM)were employed to characterize the microstructure and phase composition of the *** the phase structure and morphology at the interface between the coating and the substrate were also studied via focus ion beam(FIB)and TEM *** addition,the corrosion and wear resistance ability of the coatings were monitored by potentiodynamic polarization(PDP),and electrochemical impedance spectroscopy(EIS),hardness and friction *** results show that Cu_(2.3)Al_(1.3)Ni_(1.7)SnCr_(0.3) MPEAC with ultrasonic assisted is composed of FCC phase and eutectic phases(Cu_(10)Sn_(3) and Cu_(2)Ni_(3)Sn_(3)).Due to the forced convection generated by ultrasonic waves,some Cu and Ni phases are precipitated around Cu_(2)Ni_(3)Sn_(3) phases,which is beneficial to enhance the corrosion *** of the grain refinement effect caused by ultrasonic,the wear resistance of the coating is also ***,ultrasonic vibration can effectively weaken and eliminate the texture density of the Cu_(2.3)Al_(1.3)Ni_(1.7)SnCr_(0.3) MPEAC fabricated by laser cladding.

关键词： Magnesium alloy Multi-principal element alloy coating Ultrasonic assisted laser cladding Corrosion resistance Wear resistance

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A highly sensitive colorimetric and ratiometric sensor for fluoride ion

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Chinese Chemical Letters 2008年第11期19卷 1353-1357页

作者： ZhaoWu Xu jin Tang He tian Key Labs for Advanced Materials and Institute of Fine Chemicals East China University of Science and Technology Shanghai 200237 PR China

A new benzoimidazole-naphthalimide derivative 4 was synthesized and its photophysical properties were studied. This compound showed highly selectively and sensitive colorimetric and ratiometric sensing ability for flu... 详细信息

关键词： Naphthalimide Benzoimidazole Fluoride sensor

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A highly selective fluorescent probe for real-time imaging of UDP-glucuronosyltransferase 1A8 in living cells and tissues

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Frontiers of Chemical Science and Engineering 2022年第1期16卷 103-111页

作者： Mingyue Zhu Zhenhao tian Lingling jin Xiaokui Huo Chao Wang jingnan Cui Yan tian Xiangge tian Lei Feng College of Pharmacy School of MedicineKey Laboratory of Elemene Class Anti-Cancer Chinese MedicinesEngineering Laboratory of Development and Application of Traditional Chinese MedicinesHangzhou Normal UniversityHangzhou 311121China Dalian Key Laboratory of Metabolic Target Characterization and Traditional Chinese Medicine Intervention College of PharmacyCollege of Integrative MedicineDalian Medical UniversityDalian 116044China School of Life Sciences Northwestern Polytechnical UniversityXi’an 710072China State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116024China

Uridine diphosphate(UDP)-glucuronosyltransferases(UGTs)are enzymes involved in the biotransformation of important endogenous compounds such as steroids,bile acids,and hormones as well as exogenous substances including drugs,environmental toxicants,and ***,a novel fluorescent probe BDMP was developed based on boron-dipyrromethene(BODIPY)with high sensitivity for the detection of *** glucuronidation of BDMP not only exhibited a redemission wavelength(lex/lem=500/580 nm),but also displayed an excellent UGT1A8-dependent fluorescence signal with a good linear relationship with UGT1A8 *** on this perfect biocompatibility and cell permeability,BDMP was successfully used to image endogenous UGT1A8 in human cancer cell lines(LoVo and HCT15)in real *** addition,BDMP could also be used to visualize UGT1A8 in tumor *** results suggested that BDMP is a promising molecular tool for the investigation of UGT1A8-mediated physiological function in humans.

关键词： UDP-glucuronosyltransferase 1A8 fluorescent probe subtype selectivity fluorescence imaging

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A Rotating Pendulum Linked by an Oblique Spring

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Chinese Physics Letters 2011年第6期28卷 63-66页

作者： CAO Qing-Jie HAN Ning tian Rui-lan Centre for Nonlinear Dynamics Research School of AstronauticsHarbin Institute of TechnologyHarbin 150001 Centre for Nonlinear Dynamics Research Department of Mathatics and PhysicsShijiazhuang Tiedao UniversityShijiazhuang 050043

We present a novel model which comprises a rotating pendulum linked by an oblique spring pinned to its rigid *** model provides a cylindrical dynamical system with both smooth and discontinuous regimes depending on the value of a system parameter and also the dynamics transient relying on the coupling strength between the pendulum and the linked *** presented system behaves with both standard(smooth)and nonstandard(discontinuous)nonlinear dynamics of equilibrium bifurcations and the periodic patterns when it is *** resonant structures of period,quasi-period and stochastic phenomena are presented for the system with unique harmonic *** chaotic behavior of the system perturbed by both viscous-damping and external excitations is also demonstrated.

关键词： system perturbed discontinuous

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两样本孟德尔随机化分析循环炎症细胞因子与骨密度的因果关联

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中国组织工程研究 2025年第8期29卷 1556-1564页

作者：陈帅金杰韩化伟田宁晟李志伟南京中医药大学第二附属医院(江苏省第二中医院)骨伤科江苏省南京市210017

背景:最近许多研究表明,炎症细胞因子与骨质疏松症和骨密度之间存在密切关系,然而炎症细胞因子与骨密度之间的因果关系尚未完全揭示。目的:采用两样本孟德尔随机化方法探究炎症细胞因子与骨密度之间潜在的因果关系。方法:从全基因组关... 详细信息

背景:最近许多研究表明,炎症细胞因子与骨质疏松症和骨密度之间存在密切关系,然而炎症细胞因子与骨密度之间的因果关系尚未完全揭示。目的:采用两样本孟德尔随机化方法探究炎症细胞因子与骨密度之间潜在的因果关系。方法:从全基因组关联研究(GWAS)公开数据库中筛选出与41种循环炎症细胞因子相关的单核苷酸多态性作为工具变量。骨密度的GWAS汇总数据来自骨质疏松症遗传因素联盟(GEFOS),共涉及32735名欧洲血统的个体。逆方差加权法作为主要的分析方法来评估因果效应,加权中位数法、MR Egger回归法、简单中位数法和加权中值方法用于补充说明。利用MR-Egger Intercept和MR-PRESSO分析方法进行多效性检验,采用Cochran’s Q检验结果是否存在异质性,同时使用留一法评估结果的稳定性。另外,为了更准确地评估因果关系,采用Bonferroni校正来确定与骨密度有强因果关系的炎症细胞因子。结果与结论:①逆方差加权法分析结果显示,白细胞介素8与腰椎骨密度之间呈正向因果关系(β=0.075,95%CI:0.033-0.117,P=0.0005),白细胞介素17与腰椎骨密度之间呈负向因果关系(β=-0.083,95%CI:-0.152至-0.014,P=0.018),肿瘤坏死因子b与股骨颈骨密度之间可能存在负向因果效应(β=-0.053,95%CI:-0.088至-0.018,P=0.003),碱性成纤维细胞生长因子与股骨颈骨密度之间可能存在正向因果关系(β=0.085,95%CI:0.016-0.154,P=0.015),巨噬细胞炎症蛋白1a与全身骨密度之间可能存在负向因果效应(β=-0.056,95%CI:-0.105至-0.007,P=0.025),白细胞介素5、基质衍生因子1a、肝细胞生长因子、白细胞介素4与足跟骨密度之间存在负向因果效应(β=-0.019,95%CI:-0.031至-0.006,P=0.004;β=-0.022,95%CI:-0.038至-0.005,P=0.010;β=-0.021,95%CI:-0.041至-0.002,P=0.030;β=-0.016,95%CI:-0.032至-0.001,P=0.034),神经生长因子、粒细胞集落刺激因子与足跟骨密度之间存在正向因果关系(β=0.019,95%CI:0.002-0.036,P=0.033;β=0.011,95%CI:0.000-0.022,P=0.050);经Bonferroni校正后发现,白细胞介素8与腰椎骨密度之间有强正向因果效应(P=0.0005)。MR Egger法、加权中位数法、简单中位数法和加权中值法分析结果方向一致。②敏感性分析结果显示,循环炎症细胞因子对骨密度的因果效应没有异质性、多效性或异常值。

关键词：骨质疏松骨密度炎症细胞因子孟德尔随机化因果关系

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Profile of Dr. Zhigang tian

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Science China(Life Sciences) 2018年第12期61卷 1474-1476页

作者： tian, Zhigang Univ Sci & Technol China Hefei Anhui Peoples R China Chinese Acad Sci Inst Immunol Beijing Peoples R China Chinese Acad Sci Key Lab Innate Immun & Chron Dis Beijing Peoples R China USTC Med Ctr Hefei Anhui Peoples R China USTC Sch Life Sci Hefei Anhui Peoples R China

*** tian's laboratory is credited with seminal discoveries regarding basic knowledge and clinical study of natural killer(NK)cells,particularly liver-resident NK cells, cytokine-producing NK cell subsets,and NK cell-based *** has made outstanding contributions in the field of NK cell research,and was elected as a member of the Chinese Academy of Engineering in 2017.

关键词： tian's laboratory the Chinese Academy

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Isolation and Crystal Structure of 1',4'-Trans-diol of Abscisic Acid

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Chinese Journal of Structural Chemistry 2006年第9期25卷 1085-1089页

作者： WANG tian-Shan ZHOU jin-Yan TAN Hong Chengdu Institute of Biology The Chinese Academy of Sciences Chengdu 610041 China Department of Chemistry Hainan Normal University Haikou 571158 China

1 ′,4′-Trans-diol of abscisic acid was isolated from botrytis cinerea as a colorless crystal. The molecular and crystal structures have been determined by X-ray diffraction analysis. It crystallizes in orthorhombic system, space group P212121 with a = 6.724（3）, b = 17.559（6）, c = 12.265（2）,A,α =β=γ= 90°, V= 1448.1（8）,A^3, Z=4, Dx = 1.222 g/cm^3, F（000） = 576 and μ（MoKa） = 0.087 mm^-1. The final R = 0.0628 and wR = 0.1604 for 2501 independent reflections with Rint - 0.0160 and 1679 observed reflections with 1 〉2σ（I）. There are three intermolecular hydrogen bonds in a unit cell.

关键词： botrytis cinerea abscisic acid 1′,4′-trans-diol of abscisic acid X-ray diffraction analysis

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Stochastic frontiers or regression quantiles for estimating the self-thinning surface in higher dimensions?

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Journal of Forestry Research 2021年第4期32卷 1515-1533页

作者： Dechao tian Huiquan Bi Xingji jin Fengri Li Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education School of ForestryNortheast Forestry UniversityNo.26 Hexing RoadHarbin 150040People’s Republic of China Forest Science NSW Department of Primary Industries−ForestryLevel 1210 Valentine AveParramattaNSW 2150Australia School of Ecosystem and Forest Sciences The University of MelbourneParkvilleVIC 3010Australia

Stochastic frontier analysis and quantile regression are the two econometric approaches that have been commonly adopted in the determination of the self-thinning boundary line or surface in two and higher dimensions since their introduction to the field some 20 years ***,the rational for using one method over the other has,in most cases,not been clearly explained perhaps due to a lack of adequate appreciation of differences between the two approaches for delineating the self-thinning *** an adequate understanding of such differences,the most informative analysis may become a missed opportunity,leading to an inefficient use of data,weak statistical inferences and a failure to gain greater insight into the dynamics of plant populations and forest stands that would otherwise be *** data from 170 plot measurements in even-aged Larix olgensis(***) plantations across a wide range of site qualities and with different abundances of woody weeds,*** regenerated non-crop species,in northeast China,this study compared the two methods in determining the self-thinning surface across eight sample sizes from 30 to 170 with an even interval of 20 observations and also over a range of quantiles through repeated random sampling and *** all sample sizes and over the quantile range of 0.90 ≤τ≤0.99,the normal-half normal stochastic frontier estimation proved to be superior to quantile regression in statistical *** parameter estimates had lower degrees of variability and correspondingly narrower confidence *** greater efficiency would naturally be conducive to making statistical *** estimated self-thinning surface using all 170 observations enveloped about 96.5% of the data points,a degree of envelopment equivalent to a regression quantile estimation with aτ of *** stochastic frontier estimation was also more objective because it did not involve the subjective selection of a particular value

关键词： Larix olgensis Normal-half normal distribution Site productivity Woody weeds Sample size Quantile selection

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The effect of single-horn glaze ice on the vortex structures in the wake of a horizontal axis wind turbine

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Acta Mechanica Sinica 2015年第1期31卷 62-72页

作者： Zhe-Yan jin Qiao-tian Dong Zhi-Gang Yang School of Aerospace Engineering and Applied Mechanics Tongji University School of Automotive Studies Tongji University Shanghai Automotive Wind Tunnel Center

The present study experimentally investigated the effect of a simulated single-horn glaze ice accreted on ro- tor blades on the vortex structures in the wake of a hori- zontal axis wind turbine by using the stereoscopic particle image velocimetry （Stereo-PIV） technique. During the ex- periments, four horizontal axis wind turbine models were tested, and both ＂free-run＂ and ＂phase-locked＂ Stereo-PIV measurements were carried out. Based on the ＂free-run＂ measurements, it was found that because of the simulated single-horn glaze ice, the shape, vorticity, and trajectory of tip vortices were changed significantly, and less kinetic en- ergy of the airflow could be harvested by the wind turbine. In addition, the ＂phase-locked＂ results indicated that the pres- ence of simulated single-horn glaze ice resulted in a dramatic reduction of the vorticity peak of the tip vortices. Moreover, as the length of the glaze ice increased, both root and tip vortex gaps were found to increase accordingly.

关键词： Stereo-PIV Single-horn glaze ice. Tip vorticesRoot vortices Wind turbine icing

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